I've been playing around with the Servicedesk plus and it seems to fit our needs, the only issue I have is when I turn on and setup Pass Through Authentication with my AD, Anyone who tries to access the service desk gets a windows login prompt pop up.

Even if you enter the correct details, the prompt reappears and doesn't allow anyone to log in, On the server, it does take me to the normal login windows after a few tries which allows me to log in and turn off Pass Through Authentication.

Any suggestions before I start to look elsewhere for something that will work for us?

Many thanks
Paul